Historical on-time performance
Houston to St. Thomas
2,070 miData through Dec 2025Source: US DOT · BTS
Flights on IAH–STT arrive on time 84% of the time over the last 12 months.
On-time rate84%arrived within 15 min
p90 delay25 min1 in 10 flights is worse (tail risk)
Cancelled0.0%of scheduled flights
based on 61 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- United AirlinesOn-time84%Medianon timep9025 minCancel0.0%Flights61
Why flights run late
Delay causes
- Airline46%
- Weather0%
- Air traffic (NAS)16%
- Late aircraft38%
- Security0%
Most delay minutes here are attributed to Airline.
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly IAH → STT
All airlines · rolling 36 months (2023-01 .. 2025-12).
Best day of week
On-time rates are fairly even by day on this route — ranging from 83% to 89% on time.
- Sundays89% on time · p90 10 min · 82 flights · limited
- Saturdays83% on time · p90 30 min · 148 flights · limited
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